Composition of Bone Matrix Inorganic Salt are responsible for the hardness of bone.Bone (Osseous) Tissue Connective tissue Connective tissue Consists of cells, fibers, and extracellular matrix Consists of cells, fibers, and extracellular matrix Extracellular components are hard and calcified Extracellular components are hard and calcified Matrix is more abundant that the bone cells Matrix is more abundant that the bone cells.

Endosteum thin epithelial membrane that lines the medullary cavity of long bones. In adults it is filled with fatty yellow marrow. Medullary (marrow) cavity tubelike hollow space in the diaphysis of a long bone. Periosteum Dense, white fibrous membrane that covers bone except at joint surfaces Periosteum Dense, white fibrous membrane that covers bone except at joint surfaces Medullary (marrow) cavity tubelike hollow space in the diaphysis of a long bone.Articular Cartilage thin layer of hyaline cartilage that covers joint epiphyses and acts as a cushion. Epiphyses both ends of a long bone have a bulbous shape that provides generous space near the joints for stability and muscle attachment. Parts of a Long Bone Diaphysis main shaftlike portion Diaphysis main shaftlike portion Epiphyses both ends of a long bone have a bulbous shape that provides generous space near the joints for stability and muscle attachment.Examples include the vertebral bones that form the spine and facial bones Examples include the vertebral bones that form the spine and facial bones Irregular Bones often clustered in groups and come in various shapes and sizes. Examples include some skull bones, scapulae, ribs, and sternum Examples include some skull bones, scapulae, ribs, and sternum Irregular Bones often clustered in groups and come in various shapes and sizes. Flat bones generally broad and thin with a flattened and often curved surface. Flat bones generally broad and thin with a flattened and often curved surface.Examples include the wrist (carpals) and ankle (tarsal) bones Examples include the wrist (carpals) and ankle (tarsal) bones Short Bones cube- or box-shaped structure, which are about as broad as they are long. Examples are the femur and humerus Examples are the femur and humerus Short Bones cube- or box-shaped structure, which are about as broad as they are long. Long bones extended longitudinal axis and expanded and often uniquely shaped articular ends. Four Bone Types Long bones extended longitudinal axis and expanded and often uniquely shaped articular ends.Cancellous, or spongy, bone is characterized by open space partially filled by an assemblage of needle-like structures. Compact bone is dense and solid in appearance. Spongy Compact bone is dense and solid in appearance.

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